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earth point / Suppliers Earthing conductor on a TNS installation
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<blockquote data-quote="MK43" data-source="post: 472311" data-attributes="member: 30737"><p>Gentlemen, I am new here, I was a member of the local Electrician forum a few years back. I am a 75-year-old Electrician, I have worked in the electro-mechanical and electronic industry, I have the 238001 and 239101 city &amp; Guilds and I have been service engineer, service manager, production and electronics manager since 1970 and electrician since 1993.</p><p></p><p>My topic is:</p><p></p><p>What would you do, if you find that in a TN-S system the earth clamp on the supplier’s mains armoured cable providing the earth conductor to the installation, has been placed on top of the insulating cloth. Have you seen this? of course we all have.</p><p></p><p>I always check the Ze and whether it is or not okay (in this case it was not), I put a new earth clamp on a bare part of the mains cable, on the lead, near the head.</p><p></p><p>Am I right or wrong?</p><p></p><p>In the case I am referring to, I attempted to loosen-up the clamp to be able to remove it, but my screwdriver when thru the armoured cable like a knife on butter and the obvious happened, a little explosion.</p><p></p><p>The lead was damaged, was wafer thin, the cloth was covering the damaged area and the clamp was placed exactly over it.</p><p></p><p>The supplier complained I was negligent, and send me an invoice of £1473.10</p><p></p><p>Would you fight it? Or put it down to experience and never do it again.</p><p></p><p>If you decide to fight it how would you go about it.</p><p></p><p>I have never been a member of any association.</p><p></p><p>Any suggestions or criticisms will be welcomed. I have taken pictures if you want to see them.</p><p></p><p>Thank you.</p></blockquote><p></p>
[QUOTE="MK43, post: 472311, member: 30737"] Gentlemen, I am new here, I was a member of the local Electrician forum a few years back. I am a 75-year-old Electrician, I have worked in the electro-mechanical and electronic industry, I have the 238001 and 239101 city & Guilds and I have been service engineer, service manager, production and electronics manager since 1970 and electrician since 1993. My topic is: What would you do, if you find that in a TN-S system the earth clamp on the supplier’s mains armoured cable providing the earth conductor to the installation, has been placed on top of the insulating cloth. Have you seen this? of course we all have. I always check the Ze and whether it is or not okay (in this case it was not), I put a new earth clamp on a bare part of the mains cable, on the lead, near the head. Am I right or wrong? In the case I am referring to, I attempted to loosen-up the clamp to be able to remove it, but my screwdriver when thru the armoured cable like a knife on butter and the obvious happened, a little explosion. The lead was damaged, was wafer thin, the cloth was covering the damaged area and the clamp was placed exactly over it. The supplier complained I was negligent, and send me an invoice of £1473.10 Would you fight it? Or put it down to experience and never do it again. If you decide to fight it how would you go about it. I have never been a member of any association. Any suggestions or criticisms will be welcomed. I have taken pictures if you want to see them. Thank you. [/QUOTE]
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